Brake shoe



Feb. 14, 1928.

L. E. LONG BRAKE SHOE Orizinal Filed March 1 27 6 mm mL 0 W mm IE mm A L E L Patented Feb. 14, 1928.

UNITED STATES PATENT OFFICE.

TO IBENDIX BRAKE COMPANY, OF ILLINOIS.

BRAKE SHOE.

Application filed March 9, 1927, Serial No. 173,819. Renewed September 16, 1927.

This invention relates to articles such as brake shoes, and is illustrated as embodied in the auxiliary shoe of a three-shoe internal expanding automobile brake. An object of the invention is to provide inexpensive but extremely strong means for connecting two principal parts ofthe shoe or other article, e. g. an outer arcuate band forming the friction face of the shoe and a separate stiffening web permanently secured thereto.

Preferably, in order to simplify the manufacture as much as possible, the outer band is connected to the web, at least in part, by a series of spot-Welds uniting the central partof the band directly to the outer edge of the web. In the arrangement illustrated in the drawing, tongue-and-slot means, preferably including at least one tongue at the extreme end of the shoe, is provided to resist shearing action tending to separate the band from the web lengthwise of the shoe. These tongues may also, if desired, be spotwelded, additionally to secure the band and web together.

The above and other objects and features of the invention, including various noveland desirable details of construction, will be apparent from the following description of the illustrative embodiment shown in the accom panying drawing, in which:

Figure 1 is a perspective view of the finished shoe;

Figure 2 is an outside elevation of one end of the shoe, before the lining is attached, looking in the direction of the arrows 2-2 of Figure 1;

Figure 3 is an outside elevation, on a larger scale than Figures 1 and 2, of the other end of the shoe before the lining is attached, looking in the direction of the arrows 38 in Figure 1;

Figure 4 is'a section through the shoe, on

- the line&& of Figure 1 passing through one of the tongues; and

Figure 5 is a similar section, but on the line 5-5 of Figure 1, between the tongues.

The invention is shown in the drawing as embodied in the auxiliary shoe of a threeshoe brake of the same general type as fully described in Patent No. 1,628,388, granted Bendix Brake Company on May 10, 1927, on application of John R. Cairtley.

The shoe includes two principal parts, viz'z (1) an outer arcuate band or rim 10, to which the brake lining 12 is riveted, and

lengthwise of the shoe,

which may be stiffened by flanges 14 at its edges, and (2) a separate. stiffening Web 16 having its outer edge smoothly curved on the same radius as the inner face of band '10 and stainpings 2O spot-welded to its opposite sides, and is provided with a pivot pin 22 for a pair of cam-engaging thrust rollers 24.

At the pivoted end of the shoe, beyond the friction face proper, band 10 may be extended along the outer edge of arm 17 as an integral narrowed portion 26, to reinforce the outer portion of the arm. This extension 26 may, if desired, be formed with side wings '28 bent into engagement with the sides of arm -,17 and, if preferred, welded or otherwise secured theerto.

may be embossed or pressed in the metal of arm 17 to reinforce it along its inner edge.

The present invention relatesprincipally to the means for attaching band 10 to web 16.

In order to simplify the attachment of these two parts as much as possible, the attaching means consists principally of a series of spotwelds 32,-arranged along band 10 and extension 26, and uniting the central portion or zone of the band and extension directly to the outer edge of web 16 and arm 17.

In order to resist the shearing action of the brake drum, tending to separate band 10 from web 16 lengthwise of the shoe, I prefer to provide tongue-and-slot means additionally connecting the band and web and relieving the spot-welds 32 of all shearing strains. This means is illustrated in the drawing as including three tongues 36, at least one of which is preferably at the cam end of the shoe, projecting from the outer edge of web 16 through. slots or openings in band 10, and if desired united to the band by additional spot-welds 38.

While one illustrativeembodiment has been described in detail, it is not my intention to limit the scope of the invention to that particular embodiment, or otherwise than by the terms of the appended claims. Iclaim: 1. A brakeshoe comprising at least two A rib 30, extending principal parts, vizi (1) an outer arcuate band formed with a comparatively small number of openings spaceda substantial distance apart, and (2) ,a separate stiffening ing the central portion of the band web having tongues at its outer edge pro jecting into the openings and having its outer edge engaging the inner face of said band 'between the openings, said band being secured to the web at least in part by spotwelds between the openings uniting the central portion of the band directly to the vouter edge of the web.

2. brake shoe comprising at least two principal parts, viz: (1) an outer arcuate band formed with a comparatively small number of openings spaced a substantial distance apart, and (2) a separate stiffening web having tongues at its outer edge projecting into the openings and having its outer edge engag ng the inner face of said-band between the openings, said band being secured'to the web by spot-welding said tongues to the band and by spot-welds between the openings unitdirectly to the outer edge of the web. 3. A brake shoe comprising at least two principal parts, viz: (1) an outer arcuate band forming theffriction face of the shoe,

- r -'and1(2) aseparate stifi'ening web having at least the greater part of its outer edge smoothly curving on the same are as the innerface of said band and resting against said inner face, the band and web being connected by a series of spot-welds uniting the central portion of the band directly to the outer edge of the web. i

4. Abrake shoe comprlsing at least two ,principal parts, viz; (1) an outer arcuate band forming the fri'ctionface of the shoe,

. and (2) a separate stiffening web having at least the greater part of its outer edge smoothly curving on thesame arc as thein- I ner face ofsaid band and resting against said inner face,- the band and web being connected'by a series of spot-welds uniting the central portion of the band directly to the outer edge of the web, the band and web I being provided with tongue-and-slot means resistmg shearing action tending to separate the band from the web lengthwise of the shoe.

brake, shoe comprising at least two principal parts, viz: (1) an outer arcuate band forming the friction face of the shoe,

and (2) a separate stiffening web having at least the greater part of its outer edge smoothly curving on'the same are as the lnner face of said band and resting against central portion of the band directly to the.

said inner face, the band and web being connected by a series of spot-welds uniting the outer edge of the web, the band and web being provided immediately adjacent one 7 end of the band.with-tongue-and-slot means resisting shearing action tending to separate the band from the web'lengthwise of the shoe. a

6. An article comprising at least two principal parts, viz: (1) an outer arcuate band formed with a comparatively small number of openings spaced a substantial distance apart, and (2) a separate stifiening 7 web hav ng tongues at its outer edge projecting into the openings and having its outer edge engaging the inner face of said band between theopenings, said band being secured to the web at least in part by spot- Welds between the openin s uniting the central portion of the band directly to the outer edge of the web.

7 An article comprising at least two principal parts, viz: (1) an outer arcuate band formed with a comparatively small number of openings spaced a substantial distance apart, and (2) a separate stifiening web having tongues at its outer edge projecting Into the openings and having its outer edge engaging the inner face of said band between the openings, said band being secured to the web by spot-welding said tongues to the band and by spot-welds between the openings unitingthe central portion of the band I directly to the outer edge of the Web.

8. An article comprising at least two prin cipal parts, viz: (1) an outer arcuate band,

and 2) a separate stiffening web having at least the greater part .of its outer edge smoothly curving on the same arc as the in- I ner face of said band and resting against said inner face, the band and web bemg connected by a series of spot-welds uniting the,

central portion of the band directly to the I,

outer edge of the web.

9. An article com rising at least two principal parts, viz: (1 an outer arcuate band, and (2) a separate stiffening web having at least the greater part of its outer edge smoothly curving on the same are as the innerface of said band" and resting against said inner face, the band and web being connected by a series of spot-welds uniting the central portion of the band directly to the outer edge of'the web, the band and web berectly to the outer edge of the web, the band and web being provided immediately adjacent one end of the band with tongue-andslot means resist-ing shearing action tending to separate the hand from the web lengthwise of the web.

11. An article comprising at least two principal parts, viz: (1) an outer band, and (2) a separate web having its outer edge resting directly against the inner face of the band and permanently secured to the band by a series of separated and relatively-small portions in which the metal of the web and band is fused together, and which portions are separated by relatively-long structurally-separate portions.

12. An article comprising at least two principal parts, viz: (1) an outer band, and (2) a separate web having its outer edge resting directly against the inner face of the band and permanently secured to the band by a series of spot-welds uniting the band directly to said outer edge, the band and web being provided with tong-ue-and-slot means resisting shearing action tending to separate the band from the web lengthwise of the web.

In testimony whereof, I have hereunto signed my name.

LELAND E. LONG. 

